2001 WSC Format

The tournament will consist of a preliminary event for the first 24
rounds. The top two players at that time will play a best-of-five-game
match to determine the winner and runner-up. The player in 1st place
after 24 rounds will have the first play for the 5th game of their
match, if it's necessary.

The first 24 rounds will be paired as follows:

The players will be put into order, based upon a ranking that
includes examining how players have fared at previous World
Championships, and how well they've played in their respective nations.
Using this ranking, the whole group will be divided into groups of 4
players (with possibly one group of 6) for the 1st two rounds. For
example, if there are 100 players, #1, 26, 51 and 76 will be in the same
group. For Round 1, #1-51 and #26-76 will play. For Round #2, #1-26
and #51-76 will play, and so on for the rest of the contestants.

Rounds 3-20 will be paired using Portland Swiss pairings, with the
stipulation that there will be no repeat pairings until Round #19. One
unique feature of Portland Swiss includes pairing on the basis of
results not from the last round played, but from the 2nd-to-last-round
played. In addition, Round #3 pairs 1-19, 2-20, 3-21, ...; Round #4 pairs
1-18, 2-19, 3-20, ...; ... and Round #18 pairs 1-4, 2-5, 3-6, ....
For Round #19, repeats
are allowed, and also 1-3, 2-4, 5-7, .... Round 20 is straight
King-of-the-Hill (based upon round 18 results), with repeats allowed,
but not three-peats.

Rounds 21-24 will be straight K-H based upon the last round results.
However, since placing in the top 2 is essentially equivalent, we've
eliminated straight King-of-the-Hill for the final 4 rounds for the top
4 players only. Instead, the top 4 players will play 1-3, 2-4 for each
of these last four rounds, based upon the last round's results, with the
following exceptions: If pairing 1-4, 2-3 more evenly distributes
repeat pairings, it shall be used instead of 1-3, 2-4. However, if
pairing 1-4, 2-3 locks #1 into the top two, regardless of the outcome of
the game, then the 1-3, 2-4 pairing will be used, regardless of the
number of repeats that occur.

The Gibson Rule shall be used should one or both of the top 2 spots
be decided before the last round. This is how it works: If, after 20
rounds, one player is assured of one of the top 2 spots, then for the
remainder of the 24 rounds that player shall be paired with the
highest-placed contestant who is NOT a compatriot and NOT in contention
for a top-15 prize, which shall be determined by games won and not
spread. In that case, players #2 and #3 will play each other, and the
remainder of the pairings will be the usual King-of-the-Hill. If at
some point another player is also guaranteed to be in the top two, then
both of the finalists will play the remainder of the 24-game tourney
against each other.

For the bottom 4 (or 6) players, the pairings for the final 4 rounds
will be adjusted to more evenly distribute the number of repeats.

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